Die for drawing sheet metal



in) Mo'dl.)

BNORTON. I

2 Sheets-Sheet 1.

DIE FOR DRAWING SHEET METAL.

Patented Oct. 6, 1891.

I f .f

I I71 verz f0 7:

, zd ymm 3, ma mw udv Zeu- .lyfl rr-zeyd THE "cams PETERS 0., wasumcroh,n. c,

(No Model.) 2 Sheets-Sheet 2,

E.NORTON. DIE FOR DRAWING SHEET METAL.

v No. 460,594. Patented Oct, 6,1891.

UNITED STATES EDWIN NORTON, OF MAYWOOD, ASSIGNOR TO PATENT @Fricn.

NORTON, OF CHICAGO, ILLINOIS.

DIE FOR DRAWING SHEET METAL.

SPECIFICATIQN forming part of Letters Patent No. 460,594, dated October6, 1891'. Application filed December 31, 1890. Serial No. 376,379- (Nomodel.)

To all whom, it may concern:

Be it known that I, EDWIN NORTON, a citizen of the United States,residingin Maywood,

in the county of Cook and State of Illinois,

have invented a new and useful Improvement in Drawing-Dies, of which thefollowing is a specification.

My invention relates to dies for drawing metal into shapes.

My invent-ion operates upon the principle of successively reversing thedirection in which the metal is drawn, and at each sue-- cessive drawingturning the shape previously drawn inside out, according to theinvention of John W. Bodge, as fully set forth in his pendingapplication, Serial No. 375,935, filed December 27, 1890.

My invention consists in a operating to successively draw the metal inopposite directions, the shape drawn by the first action being turnedinside out by the second action of the compound acting dies.

It also consists in the combination of a cutting-die with said compounddrawing-die,'opcrating to draw the metal in opposite directions.

It also consists in the combination, with the punch or male die andannular die for drawing and reducing the shapeand turning it inside out,of a sleeve surrounding said annular die, so that the cylindrical orother wall of the metal shape to be turned inside out will be supportedand guided both inside-and out on the inside by the annular die andonthe outside by said surrounding sleeve.

It also consists in the combination, with said punch and annular die, ofa pushing ring adapted to push against the end or edge of the metalshape which is to be drawn and reduced by turninginside out, therebyfacilitating the drawing operation and relieving the metal to be drawnfrom undue strain.

It also consists in the combination, with a punch and annulardrawing-die for drawing and reducing the metal shape by turning itinside out, of said pushing-ring and said sleeve surrounding saidannular die.

It also consists in the novel devices and novel combination of parts anddevices herein 56 shown and described, and more particularly pointed outin the claims.

compound die (HIMSELF, AND, oLIvER w.

In the accompanying drawings, which form a part of this specification,and in which simi:

lar letters-of reference indicate like parts, Figure lfis a centralvertical sectional view of a device embodying myinvention; and Fig. 2 isa similar view on a smaller scale, showing the same device with thecutting-die omitted.

.In the drawings, A represents the bed-plate of the press. l3 is 'afemale cutting-die secured thereto. C is a die-block having a cuttingedge or die 0, which operates-in conjunction wit-h the femalecutting-die B, and having a female drawingdic c, whichoporatesinconjunction with the outer or male drawing-die face (1 of theannular die D. The annular die D has an inner face or periphery :1,operating as a female drawing-die in conjunction with the cates withinthe hollow die-block C.

F is the follower or presser-ring, surroundpunch'or male drawing-die E,which recipro ing the annular drawing-die D, and supported 7 upon pins ffrom the rubber spring F.

G is a metal tube secured to the bed-plate, and which supports therubber spring F, and through which the shapes, drawn by the dies D E,are discharged. The annular die D has the usual projection or ofiset don its inner face to facilitate the discharge of the work.

The operation is as follows: A sheet of metal being placed across theface of the cutting-die B, the annular die-block G descends, thuscausing its cutting-edge or die 0 to cut out the blank in the usualmanner, and as the die-block continues to descend the blank is stampedor drawn down over the annular die D into the shape shown inFig. 1 ofthe drawings. The next action is for the punch E to descend and draw theinverted shape m inside out over the end of said punch E and through theannular die D into the I shape 00. During the first drawing operation ofthe compound die the follower or presser F serves its usual function ofpressing against the blank, and keeping .it smooth as His drawn. on doperation the blank or shape as is guided and supported and kept smoothby the outer periphery of the annular die D, which sup ports it upon theinside, and also by theinner During the reverse drawing orsecperipheryof the hollow die-block C, which guides and supports the shape :2: uponits outside. In this latter operation this dieblock 0 serves simply as asurrounding sleeve to support and guide the cylindrical wall of theshape :0 upon the outside thereof during the reverse drawingoperation,and it will be obvious to those skilled in the art that thiscombination or feature of my improvement may be practiced without usingthe die-block 0, either as a' cutting-die or as a female drawing-die forproducing the first drawing operation-that is to say, this feature of mimprovement maybe used in conjunction wit 1 a punch and annular die forturning the shape inside otft and entirely independent of the compounddie or cutting-die.

By providing an independent follower or presser-sleeve H, surroundingthe punch E and inside the hollow die-block G, I am enabled to withdrawthe die-block C during'the second or reverse drawing operatiomand thuspermit the spring follower or presser F to push against the end or edgea) of the shape m to facilitate the reverse drawing operation. Thismaterially relieves'the stock from strain during the second or reversedrawing operation. It will of course be readily understood by thoseskilled in the art that this pushing function of the ring Fin the secondor re verse drawing operation may 'be used entirely independently of theblank smoother or presser function, which the follower ring F has inthefirst drawing operation.

As shown in Fig. 2, the invention is applied to an already drawn shape,and no cuttingdies are of course employed in the compound die oLFig. 2.

My improved compound die may be attached to any well-known form ofcompoundacting press, or the several movable parts of the compound diemay be moved by hand,if desired. As the construction of presses is wellknown to those skilled in the art, and as my resent improvement relatessimply to the ies, I have not thought it necessary to hereiushow ordescribe a press.

I claim- 1. The combination, with a punch, of a female drawing-die andan annular drawingdie having an outer periphery orface operating as amale die in conjunction with said female die and an inner periphery orface operating as a female die in conjunction with said punch, wherebythe metal is drawn first in one direction and then in the opposite, the

ring or device surrounding said ann shape first produced being turnedinside out by the second operation. substantially as specified.

2. The compound die for first drawing a shape and then turning it insideout, and thus producing'a deeper shape of smaller diameter, consistingof a hollow die-block C, an annular die D, adaptedto reciprocate withinthe cavity of said hollow die 0, and a punch E, adapted to reciprocatewithin said annular die D, said hollow die-block 0 operating inconjunction with the outer periphery or face of said annular die Dtofirat draw the shape, and said punch ,E operating in conjunction withthe inner periphery or face of said annular die to turn the shape insideout, and thus produce a smaller and deeper shape,substantially asspecified.

3. The combination, with a cutting-die B, of hollow die-block 0, havinga cuttingedge or die 0, annular die E, substantially as specified.

4. The combination, with a cutting-die B, of hollow die-block 0, havinga cutting edge or die 0, annular die D, punch or male die E, and afollower or blank smoother F, substantially as specified. I

5. The combination, with a punch and an annular die for drawing a metalshape by turning it inside out, of a sleeve surrounding said annular dieto aid in supporting,

guiding, and smoothing the peripheral wall of the shape to'be drawn andreversed or turned inside out, substantially as specified.

6. The combination, with a punch or male die and an annular die. fordrawing a metal shape by turning it inside out, of a pusher ring ordevice surrounding said annular die and engaging the end or edge of themetal shape to be drawn to facilitate the drawing operation,substantially as specified.

7. The combination, with a punchor male die and an annular diefordrawing a metal shape by turning it inside-out, of a pusher u ar die andenga ng the end or edge of the metal shape to e drawn to facilitate thedrawing operation, and a sleeve or guide surrounding said annular diefor supporting the peripheral wall of the shape to be drawn,substantially as specified.

EDWIN NORTON.

Witn esses:

H. M. MUNDAY, EMMA HACK.

die I), and a punch or male

